Electrical apparatus



E,-D.-EBY. ELECTRICAL APPARATUS.

APPLICATION FILED OCT. 23, 1 91 9- Patented M 9, 1922.

V Ihventor: I Eu ene D. Eby,

H is Attorney.

UNITED STATES PATENT OFFICE.

EUGENE D. EBY, 0F PITTSFIEID, MASSACHUSETTS, ASSIGNOR T0 GENERAL ELECTRI COMPANY, A CORPORATIONOF NEW YORK.

ELECTRICAL errana'rns;

Specification of Letters Patent.

Patented May 9,1922;

Application filed October 23, 1919. Serial No. 332,618.

T 0 all whom it may concern:

Be it known that L'Eucnnn D. Ear, a citizen of' the United States, residing at Pittsfield in the county of Berkshire, State of Massachusetts, have invented certain new and useful Improvements in Electrical Apparatus, of which the following is a specification.

My invention relates to electrical apparatus and particularly to high tension oil submerged apparatus, and has for its object an improved arrangement of parts which is durable in service and very coonomical both from a manufacturing and from an operating standpoint.

ln apparatus of this type, where a large amount of heat is to be dissipated, it is preferable to make the tanks containing the oil submerged apparatus quite deep, i. e., so that there will be a considerable head of oil above the apparatus itself, in order to pro- I vide a heat radiating body of considerable mass. To meet these requirements and yet use as little oil as possible, it is desirable that the tank should have a small perimeter and be relatively deep, The minimum permissible clearance between the sides of the tank and the apparatus therein would hence be the controlling factor in determining the, perimeter. This factor however often permits the use of a tank whose mouth is so small that the high'tension bushings used to bring in the high voltage leads to the encased apparatus cannot be spaced apart in the ordinary manner sufliciently to have .a

safe electrical clearance between their lower ends which-project into the tank. By my improved arrangement however I mount the high tension bushings very close together in the cover of the tank but pitch them at such angles that their lower and upper ends are further apart within and. without the tank than are the bushings at the. point where they enter the tank. In this novel manner I am enabled to get the necessary electrical clearance between both ends of the bushings although they are'secured relatively close together. a

For a more complete understanding of thenature and objects of my invention ref-f erence should be had to the following detailed description when taken in connection with the accompanying drawing in which:

Fig. 1 is a side view partly in elevation and partly in section of an encased transformer former 11.

quently has relatively a small area in which to mount the high voltage bushings; the low voltage bushings (not shown) being The preferably placed in pockets formed at. suitable points, here indicated under the lobe 14 on the cover 13, in the upper rim of the tank.

The high voltage bushings, which may be of the type shown in U S. Letters Patent No. 1,304,283 issued in my name on May 20, 1919, are shown at 15 and 15. These bushings are secured to the cover through openings 16 and 16" which are relatively close together,so near in fact, where my invention is applied, that the distance between the bushings at this point is'less than the minimum electrical clearance .permis sible between exposed conducting parts which have impressed across them the potential difference designed to be carried by the conductors in the bushings;

To. provide the necessary electrical clears ances between the. ends .of the bushings, interiorly as well as exteriorly, l have mounted the bushings on the cover,-each at an acute, angle, as a and a oppositely disposed in different planes as P and'P (Fig. 2) so that while their points of support in the cover are less distant than the minimum electrical clearance distance, yet their upper ends 20 and 20', and their submerged lower ends 21 and 21 are by this "arrangement pitched away from each o-t her sothat the necessary electrical clearance obtains .between such ends. I V

I Cables22 and 22"" are shown as leading from the submerged lower ends 21 and 21 of the bushings to the windings of the trans- By the use of my invention it is thus seen possible to use a smaller and more economical tank than would be otherwise permi sible.

While l have here shown an embodiment of my invention which is. at present, the best means known to me for carrying the same into efi-ect, I Would have it understood that this is merely illustrative and that it do not mean to be limited thereby to the precise details here disclosed since obvious alterations thereoi Will appear to those skilled in this art, nor in the choice of recognized equivalents except as defined in my claims hereunto annexed.

What I claim as new and cure by Letters Patent of States, is: p

1. In oil submerged electrical apparatus, the combination with a tank having a cover, of high voltage bushings mounted in said cover making oppositely disposed acute angles with said cover in different planes.

2. In oil submerged electrical apparatus,

desire to sethe United the combination with a tank having a cover, of high voltage bushings mounted in said cover at a distance less than the permissible electrical clearance between the exposed ends of the conductors o'l said bushings. said bushings having their axes reversely inclined on opposite sides of the cover Whereby both their ends diverge sufficiei'itly to provide the necessary electrical clearances.

3. In oil submerged electrical apparatus, the combination with a tank having; a cover, of high voltage bushings mounted in said cover at a distance less than the permissible electrical clearance between the exposed ends of the conductors of said bushings, but pitched to make oppositely disposed acute angles with said cover in different planes.

In Witness whereof, I have hereunto set my hand, this twentieth 1919.

EUGENE D. EBY.

day of October, 

